/Engine/Source/Runtime/Engine/Classes/Animation/AnimInstance.h
Plays an animation montage. Same as Montage_Play, but you can overwrite all of the montage's default blend in settings.
float Montage_PlayWithBlendSettings ( [UAnimMontage](API\Runtime\Engine\Animation\UAnimMontage) * MontageToPlay, const [FMontageBlendSettings](API\Runtime\Engine\Animation\FMontageBlendSettings) & BlendInSettings, float InPlayRate, EMontagePlayReturnType ReturnValueType, float InTimeToStartMontageAt, bool bStopAllMontages )